Number of items in a stack show through item name tags

When I hover over an item in a chest, the amount of items in a stack of items also in the chest show through the item name tag. It's quite difficult to explain, so I hope the screenshots are pretty self explanatory. This appears to be a Snapshot - specific issue as I have tested this in the previous snapshots for 1.16 and in 1.15.2 and the bug doesn't appear to be there.